mkfs.erofs fails (failed to build shared xattrs, err 61)

[Gao Xiang]

Hi Gael,

On 2024/3/12 17:57, Gael Donval wrote:
> Dear list,
> 
>     $ mkdir foo && touch foo/bar && mkfs.erofs foo.erofs.img foo
>     
>     mkfs.erofs 1.7.1
>     <E> erofs: failed to build shared xattrs: [Error 61] No data available
>     <E> erofs: 	Could not format the device : [Error 61] No data available
>     
> That is at a location backed by BTRFS (btrfs-progs v6.7.1) on kernel 6.8.0.
> 
> If I use a TMPFS-supported folder instead all goes well.
> 
> 
> Of course (NB "-x-1"),
> 
>     $ mkdir foo && touch foo/bar && mkfs.erofs -x-1 foo.erofs.img foo
> 
> also works but is not how mkfs.erofs is meant to work in the general case.

Thanks for your feedback.

Currently I don't have some BTRFS environment, I could set up one later.
Yet in parallel could you provide a full message of
"strace mkfs.erofs -x-1 foo.erofs.img foo" on BTRFS too?

Thanks,
Gao Xiang

> 
> Kind regards,
> Gaël